Anion-dependent assemblies of a series of Cd(ii) coordination complexes based on an asymmetric multi-dentate ligand and inorganic SBUs: syntheses, crystal structures, and fluorescent properties

Abstract

Six novel Cd(ii) complexes based 1-(benzotriazole-1-methyl)-2- propylimidazole are synthesized. These complexes share common features such as they all contain inorganic SBUs and have a high degree of dependence on the corresponding counter anions.

Twelve Cadmium(II) Coordination Frameworks with Asymmetric Pyridinyl Triazole Carboxylate: Syntheses, Structures, and Fluorescence Properties

“…Metal–organic frameworks (MOFs) have been rapidly developed in recent years and received great attention not only due to their intriguing structures and diverse topologies, but also because of their interesting properties and possible applications as functional materials. − However, it is still a big challenge to rationally and predictably prepare the desired crystalline products. The resulting structures will be determined by several factors, including the coordination geometry of metal ions, the structural characteristics of ligands, the solvent system, temperature, counteranions, − and so forth. Among these factors, anions have attracted considerable attention due to their great effect on the crystal packing and topologies of coordination polymers in terms of their differences in the size, shape, charge, coordination ability, as well as the coordination modes to metal ions.…”

“…On the other hand, although a large number of organic molecules have been investigated as potential linkers, metal–organic frameworks with diverse topology incorporating carboxylate, pyridine, or triazole ligands have witnessed the most important development. − However, the ligands comprising triazole, carboxylate, and pyridine groups have not been studied thoroughly up to now. In this paper, we designed and synthesized a new ligand with one carboxylate, one pyridine and one triazole groups, namely, 1-(4-pyridinylmethyl)-1 H -1,2,4-triazole-3-carboxylate (Hpmtc), as a continued investigation concerning the influence of anions on the self-assembly processes, because it has remarkable features in the construction of MOFs: (i) The Hpmtc ligand containing multidentate carboxylate, pyridine, and triazole is a potential multipurpose bridge that could facilitate construction of high-dimensional structures. Additionally, the Hpmtc ligand has one possible steric configuration by rotating pyridine rings with different angles, which therefore can exhibit versatile fashions to satisfy the space geometries of the metal ions.…”

“…The unusual structures, topologies, roles of anions, and photoluminescence properties are described and discussed in detail. To the best of our knowledge, this paper presents the largest number of inorganic anions that have been involved in coordination in all the reported literature, − which offers an opportunity for us to discuss the roles of anions.…”

Crystal structure of bis{1-[(benzotriazol-1-yl)methyl]-1H-1,3-(2-methyl-imidazol)}di-chloridomercury(II), [Hg(C11H11N5)2Cl2], C22H22N10Cl2Hg

“…The multidentate N-heterocyclic compounds containing rich coordination sites and presenting various coordination modes, are often employed to produce coordination polymers [4][5][6][7][8][9]. In recent years, our group synthesized N-heterocyclic compounds based on 1-[(benzotriazol-1-yl) methyl]-1-H-1,3-(2-methyl-imidazol)(bmi), and studied its coordination behavior with metal ions, obtaining a series of coordination compounds [10][11][12][13][14][15][16].…”

Zero-, one-, two- and three-dimensional coordination polymers based on tetracarboxylic acid: Syntheses, structures, magnetic and luminescent properties

“…The mixture was then transferred to and sealed in a 25 mL Teflon-lined stainless autoclave, followed by heating at 140 C for 72 h to afford colorless block-shaped crystals in 57.9% yield after slowly cooling to room temperature at a rate of 5 C/h. Elemental analysis calculated for C 28 …”